Tarp roller

ABSTRACT

A tarp roller for rolling a tarp or other ground cover has a frame adapted for mounting to a tow vehicle. The frame has a first support arm and a second support arm extending therefrom in spaced part relation. A primary rotatable spindle is powered and removably connected between the first support arm and the second support arm. A retainer to retain the tarp against the primary rotatable spindle comprises an elongate member mounted in removable spaced apart, coaligned relation with the primary rotatable spindle to move with the primary rotatable spindle as it rotates. The tarp roller further comprises further a secondary guide roller rotatably attached to the frame at a position above and forward of the primary rotatable spindle. A method of rolling a tarp is provided.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to pending U.S. Provisional ApplicationSer. No. 62/534368, filed Jul. 19, 2017, the contents of which areincorporated herein by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates generally to rollers for mechanicallydeploying tarps or similar sheeting cover materials on golf greens,sports fields, landscaped areas, landfill sites and the like.

BACKGROUND OF THE INVENTION

Much of the cost of operating a golf course is attributable to theexpense involved in planting, maintaining and grooming the turf of golfgreens. In geographic regions which experience harsh wintersconsiderable time, effort and resources may be required to repairportions of turf killed off by freezing, desiccation, and damage fromanimals grazing or scavenging for food. In order to reduce off seasonturf damage and to shorten the time required to prepare golf courses foruse at the beginning of a new playing season, many course operators useturf covers to protect greens during the off season. There are manybenefits to using turf covers including reduction of winter kill,preventing animal damage, maintaining less extreme ground temperatures,reducing fertilizer evaporation, and promoting healthy plant roots andearlier turf green up. The turf covers used on the greens are made of abreathable fabric that allows for sun and water infiltration whilekeeping the surface under the tarp warmer than the air above it. Bynecessity turf covers are expansive, taking the form of strips or sheetsof tarp covering thousands of square feet of area. The tarps are laidand secured to cover the turf in the fall and then removed in earlyspring at the beginning of the growing season.

It is extremely difficult to remove soiled greens covers (tarps) inearly spring for a number of reasons. First, the timing of tarp removalis always during the spring melt. The weather can range from cold andsunny to cool and raining. Conditions are not favorable for outdoorwork. The ground may be soft and muddy. The tarps are usually wet, heavyand soiled. In order to remove the tarp covering, the tarps havetypically been folded and rolled manually much like a sleeping blanketis rolled up. The work is awkward, dirty and very labour intensive,which makes it expensive. It is difficult to motivate a seasonal workforce to return to work in later winter or early spring to remove thesecovers.

There is a need for a device which can mechanize the tarp removalprocess, particularly the steps of uptake and rolling of the tarps afterthey have been folded into strips, and the transport of rolled tarps tostorage facilities. There is a need for a device which can both removewater from the tarps and roll them up into a compact roll. Since thework of deploying and removing tarps from golf greens or other turfsurfaces occurs outdoors and on site, there is a need for a device whichis rugged and yet easy to operate. It should be a simple matter toremove rolled tarps from the device with a minimum of workers' physicalexertion.

SUMMARY OF THE INVENTION

A tarp roller for rolling a tarp comprises a frame adapted for mountingto a tow vehicle. The frame has a first support arm extending therefrom,and a second support arm extending therefrom spaced part from the firstsupport arm. A primary rotatable spindle is powered and removablyconnected between the first support arm and the second support arm and aretainer retains the tarp against the primary rotatable spindle. Theretainer comprises an elongate member mounted in removable spaced apart,coaligned relation with the primary rotatable spindle to move with theprimary rotatable spindle during rotation thereof. The retainer ismounted to the primary rotatable spindle by a retainer mounting platewhich defines a channel to receive the elongate member in torquetransmitting engagement. The tarp roller further comprises a secondaryguide roller rotatably attached to the frame at a position above andforward of the primary rotatable spindle.

In a method of rolling a tarp the first step is feeding the tarp over asecondary roller attached to a frame of a tarp roller at a positionabove and forward of a primary rotatable spindle. The tarp is placedbetween the primary rotatable spindle and a retainer comprising anelongate member mounted in removable spaced apart, coaligned relationwith the primary rotatable spindle. The primary rotatable spindle isrotated in a first direction to take up the tarp. After the tarp hasbeen rolled onto it, the primary rotatable spindle is rotated in anopposite direction to release tension within the rolled tarp. Theprimary rotatable spindle and the retainer are separated from the frameof the tarp roller. The primary rotatable spindle and the retainer areremoved from the rolled tarp.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing summary, as well as the following detailed description ofthe disclosure, will be better understood when read in conjunction withthe appended drawings. For the purpose of illustrating the disclosure,there are shown in the drawings embodiments which are presentlypreferred. It should be understood, however, that the disclosure is notlimited to the precise arrangements and instrumentalities shown in thedrawings.

FIG. 1 is a perspective view showing a tarp roller according to apreferred embodiment of the present invention;

FIG. 2 is an exploded view of the tarp roller of FIG. 1.

FIG. 3 is a second exploded view of the tarp roller of FIG. 1 taken at adifferent angle.

FIG. 4 is a perspective view of a tarp placed onto a tarp roller forrolling.

FIG. 5 is a side view of a tarp being rolled on the tarp roller.

DETAILED DESCRIPTION OF THE INVENTION

Referring now to the drawings, a tarp roller is shown generally byreference numeral 10. The tarp roller 10 has been designed to mechanizethe process of rolling and unrolling a tarp 12 used to cover a groundsurface 14. It is should be noted that this tarp roller 10 may haveother applications in agriculture, property management, management ofsports facilities, etc. to assist in the rolling (spooling) of the shadecovers, as well as other sheet materials and flexible tubing materials.

The tarp roller 10 comprises a frame 16 adapted for mounting to a towvehicle 18. The tow vehicle 18 shown in FIG. 1 is a tractor, which isthe type of vehicle most commonly used, but other options, such as afork lift, mower, utility vehicle, etc. could be substituted. The frame16 is preferably constructed from A500 Grade steel. The frame 16 must besufficiently robust to support the weight of a roll of tarp which,inherent in its elongated shape and size may subject the frame 16 toforces which could cause buckling or sagging. It has been found thatconstructing the frame 16 from rectangular steel tube provides neededrobustness and rigidity to eliminate torque particularly in the supportarms. An A-Frame design is utilized to effectively transfer the loadfrom the ends of the frame to the center tractor mounting points.

The frame 16 has a first support arm 20 extending therefrom and a secondsupport arm 22 extending therefrom. The second support arm 22 is spacedapart from the first support arm 20. Typically, though not necessarily,the frame 16 will measure approximately 2-3 meters wide from its firstend 24 to its second end 26. It has been found that frame widths in thisrange provide a tarp roller which can be easily mounted to and towedbehind a tow vehicle such as a tractor or fork lift. The frame 16 isadapted for towing behind the tow vehicle 18. As best seen in FIG. 1 andFIG. 4, the adaptation is typically a hitch mount bracket 28 for usewith a conventional three-point tractor hitch 19. Other adaptations formounting may be substituted. The hydraulics of the tow vehicle 18 areused to power the raising and lowering of the tarp roller 10 by means ofthe three-point tractor hitch 19.

A primary rotatable spindle 30 is powered and removably connectedbetween the first support arm 20 and the second support arm 22.Different options exist for mounting the primary rotatable spindle 30 tothe frame 16 of a tarp roller and powering it for rotation. The primaryrotatable spindle 30 could be direct driven off a hydraulic motorpositioned in line with the primary rotatable spindle; however, thisarrangement would significantly increase the overall width of the tarproller. Alternatively, a power train can be used to transfer power froma motor to a drive shaft for rotation of the primary rotatable spindle.Details of the preferred embodiment of the manner of connection andpower are best seen in the exploded views of the tarp roller 10 shown inFIG. 2 and FIG. 3. The primary rotatable spindle 30 is removablyconnected to the first support arm 20 through a drive coupling assembly32 operatively connected to a hydraulic motor 34. The drive couplingassembly 32 can be constructed as an assembly of known parts. Thecomponent parts of a coupling assembly 32 and the manner by which theprimary rotatable spindle 30 is powered according to an embodiment ofthe present invention are shown in FIG. 3 for illustrative purposesonly. A hydraulic controller 36, is in operative connection with thehydraulic system of the tow vehicle 18. The hydraulic controller 36controls the operation of the hydraulic motor 34, which is operativelyconnected by means of a motor sprocket 38, drive chain (not shown) and aroller sprocket 40 through shaft 42. A chain guard 41 may be secured tothe first support arm 20 to protect the sprocket and drive chain system.A pillow block bearing 44 supports the shaft 42 which is operativelyconnected by a spider coupling 46 into which a first end (not seen) ofthe primary rotatable spindle 30 is received in the spider coupling 46for support and to power rotation. A second end 48 of primary rotatablespindle 30 receives and is supported on a spindle support shaft 51 heldby a bearing 50 mounted on the second support arm 22. The spindlesupport shaft 51 transfers the downward load (resulting from the weightof the primary rotatable spindle and the rolled tarp) onto the secondsupport arm 22 of the frame 16. This arrangement protects the bearing 50which is designed to take load in the vertical direction and cannotwithstand significant twisting forces.

In an embodiment of the invention, the second support arm 22 of the tarproller 10 is removably attached to the second end 26 of the frame 16.The removeable attachment means 52 may take one of several forms. Oneembodiment of a removeable attachment means can be seen in FIG. 3. Ahinge 52 is used, and its mating component parts of the hinge areattached to the second end 26 of the frame 16 and to the second supportarm 22. It would be possible to disengage the hinge pin from the hingeto remove the second support arm 22 from the frame 16.

Although it is not illustrated in the figures, another example, of amoveable attachment means could comprise one or more rectangular tubebrackets fixed to the second support arm 22 and then received in atelescoping manner within the rectangular steel tubes which form theframe 16. Removable anchoring pins could be secured through the bracketsand rectangular steel tubes of the frame 16 to secure the second supportarm in attached relation to the frame.

In the preferred embodiment of the invention, the second support arm 22is moveably attached to the frame 16. Not only does the hinge 52 provideremovable attachment, as discussed above, but it also permits the secondsupport arm 22 to be moveable while it is attached to the frame 16. Alatch 49 is positioned near the hinge 52 and mating component parts ofthe latch 49 are mounted to the frame 16 and the second support arm 22.A latch pin (not shown) can be inserted through the mating components ofthe latch 49 to secure it in a closed position. The removal of thesecond arm support 22 from the frame 16, or the movement of the secondsupport arm 22 with respect to the frame 16 provides sufficient spacefor disengaging the primary rotatable spindle 30 out of itsrolling/working position thus allowing the removal of a roll of tarpfrom the tarp roller.

In the preferred embodiment of the invention as shown in the figures,the moveable attachment means 52 is a hinge. In FIG. 4 the latch 49 isopen and the hinge 52 has been actuated to pivot the second support arm22 relative to the second end 26 of the frame 16 thereby increasing thedistance between the first support arm 20 and the second support arm 22when considered at the locations where the first end of the primaryrotatable spindle 30 is mated with the coupling assembly 32 mounted tothe first support arm 20, and the second end 48 of the primary spindle30 mates with the bearing 50 on the second support arm 22. Varying thedistance between the first support 20 arm and the second support arm 22at this point permits disengagement of the ends of the primary rotatablespindle 30 from the drive coupling assembly 32 and from the spindlesupport shaft 51 and its bearing 50. When the primary rotatable spindle30 has been disengaged, a tarp spool 54 can be slid over the primaryrotatable spindle 30.

The tarp roller 10 further comprises a retainer 56 for retaining thetarp 12 against the primary rotatable spindle 30. The retainer 56 can beseen in operation in FIG. 4, and its components can be seen in greaterdetail in the exploded view in FIG. 2. The retainer 56 comprises anelongate member 58 mounted in removable, spaced apart, coalignedrelation with the primary rotatable spindle 30 to move with the primaryrotatable spindle 30 as it rotates. A retainer mounting plate 60 isfitted to the primary rotatable spindle 30 adjacent to spider coupling46. The retainer mounting plate 60 defines a channel 62 to receive theelongate member 58 in torque transmitting engagement. In addition tosecuring the elongate member 58 and transferring torque from the primaryrotatable spindle 30 to elongate member 58, the retainer mounting plate60 also eliminates twisting thereof. A U-cap and lock pin assembly 64secures the elongate member 58 within the channel 62 forming a pivotpoint. The U-cap and lock pin assembly 64 secures the elongate member 58in position during the rolling operation and prevents the elongatemember 58 from sliding left or right and becoming disengaged. A retainerend plate 66 rides on the bearing 50 located on the second support arm22. The retainer end plate 66 defines an opening 68 to receive theprimary rotatable spindle 30. The retainer end plate 66 also defines anopening 70 through which the elongate member 58 is received. Multipleopenings 70,70 may be positioned along the second primary roller endplate 66 at specified distances from the opening 68 for the primaryrotatable spindle 30. The selection of which opening 70 receives theelongate member 58 will determine the distance between the primaryrotatable spindle 30 and the elongate member 58. This feature permitsadjustment of the retainer 56 to accommodate different tarp thicknessesand provides control over how tightly the tarp 12 will be retainedagainst the primary rotatable spindle 30. In use, an end of the tarp 12is placed between the primary rotatable spindle 30 and the elongatemember 58 of the retainer 56 and retained against the primary rotatablespindle 30 as it is rotated, thereby winding the tarp 12.

The tarp roller 10 further comprises a secondary guide roller 72rotatably attached to the frame 16 at a position above and forward ofthe primary rotatable spindle 30. The secondary guide roller 72 isrotatably mounted (at a first end thereof) by means of a first pillowblock bearing 74 fastened to a first bracket 76, which may be receivedin a socket 78 defined by the first support arm 20. At a second endthereof, the secondary guide roller 72 is rotatably mounted by means ofa second pillow block bearing 80 which is fastened to a second bracket82, which may be received in a socket 84 in the second support arm 22.The position of the secondary guide roller 72 in front of the primaryrotatable spindle 30 ensures that, in use, the length of tarp 12 willfirst contact the secondary guide roller 72 as it is pulled toward therotating primary rotatable spindle 30. As the tarp 12 contacts thesecondary guide roller 72 loose dirt may fall away from the tarp 12. Theposition of the secondary guide roller 72 above the primary rotatablespindle 30 creates a downward path of travel as the tarp 12 moves towardand is rolled onto the primary rotatable spindle 30. The tarp 12 ispressed downward against the secondary guide roller 72 as it travels thedownward path, compressing folds of the tarp. The compression of thetarp results causes a tighter roll to form on the primary rotatablespindle 30 and also forces out any water entrained within the folds ofthe tarp 12.

The frame 16 further comprises a skid plates 86, 86 mounted at eitherthereof. Each skid plate 86 provides a smooth and somewhat roundedsurface which will contact the ground surface 14 during rolling andunrolling of the tarp. The skid plates 86 distribute the weight of thetarp roller more evenly on the ground surface. The skid plates 86 reducethe risk of damage to high value ground surfaces such as manicured golfgreens in the rare case that the user forgets to raise the tarp roller10 out of contact with the ground before moving forward.

In use, the tarp roller 10 is mounted on the three-point hitch of thetow vehicle 18, typically a tractor, and it powered by its hydraulicsystem. The tarp 12 must be lifted from the ground surface and foldedonto itself to form a multilayered strip having a width of approximately2 meters and a length determined by its overall dimensions inpreparation for rolling. Typically, a tarp spool 54 is placed over theprimary rotatable spindle 30 prior to commencing the rolling process tofacilitate easy handling of the rolled tarp 12, but this step isoptional. Without a spool it can be difficult to remove the tarp 12 fromthe primary rotatable spindle 30. The use of a spool allows therolled-up tarp 12 to be placed back onto the tarp roller 10 to beunwound onto the turf; however the use of a spool is not necessary forthe tarp roller 10 to function.

The method of rolling a tarp 12 comprises the following steps. The firststep is feeding the tarp 12 over the secondary guide roller 72. The tarp12 is then placed between the primary rotatable spindle 30 and theretainer 56. The primary rotatable spindle 30 is rotated in a firstdirection to spool the tarp 12 onto the primary rotatable spindle 30. Insituations where the tarp 12 is only a layer or two thick, it can be fedbetween the primary rotatable spindle 30 and the retainer 56.

It is more common for the tarp 12 to be quite thick when it is ready tobe rolled, as it typically needs to be folded multiple times in order toachieve an approximately 2 m width needed to fit the primary rotatablespindle 30 of the tarp roller 12. In this situation, the tarp 12 isplaced over the secondary guide roller 72 and placed over the primaryrotatable spindle 30. The retainer 56 is installed on top of the tarp 12by feeding the elongate member 58 into the channel 62 of the retainermounting plate 60 and into the channel 70 of the retainer end plate 66.The elongate member is then secured in place with the U-cap and lock pinassembly 64. There may be multiple channels 70 in the retainer end plate66 and the user can select one of the channels to fit the elongatemember 58 such that it holds the tarp 12 securing against the primaryrotatable spindle 30 regardless of the thickness of the folded tarp 12.After the primary rotatable spindle 30 has been rotated in a firstdirection to take up the tarp, the rolled tarp may be secured with ropeor strapping so that it does not unroll.

The method of rolling the tarp continues with the steps of rotating theprimary rotatable spindle in an opposite direction to release tensionwithin the rolled tarp; separating the primary rotatable spindle 30 andthe retainer 56 from the frame 16 of the tarp roller; and, removing theprimary rotatable spindle 30 and the retainer 56 from the rolled tarp.The following description will provide greater detail regarding themanner in which these steps are carried out. In order to stabilize therolled tarp, the three-point hitch 19 is lowered so that the frame 16 ofthe tarp roller 10 is in contact with the ground surface 14 and therolled tarp 12 rests on the ground surface 14. Once the tarp 12 rests onthe ground surface, the hydraulic controller 36 is actuated to rotatethe primary rotatable spindle 30 in the opposite direction for tworevolutions to release tension within the rolled tarp 12. In order toprovide additional work space, particularly if the user is working witha large roll, the secondary roller 72 may be removed from the tarproller 10 by removing the first bracket 76 from the first socket 78 inthe first support arm 20 and removing the second bracket 82 from thesecond socket 84 in the second support arm 22.

After the secondary roller 72 has been removed, the second support arm22 is moved by removing the latch pin from latch 49 and swinging thesecond support arm 22 on hinge 52 to a more distant position to provideclearance space. The primary rotatable spindle 30 is then separated fromthe drive coupling assembly 32 and the spindle support shaft 51 isremoved from the primary rotatable spindle 30. The tow vehicle 18 withthe frame 16 can then be moved out of the way. The primary rotatablespindle 30 and the retainer 56 are then removed from the rolled tarp 12.The tarp roller 10 may then be reassembled by reversing the foregoingsteps.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the invention. Asused herein, the singular forms “a”, “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. It will be further understood that the terms “comprises”and/or “comprising,” when used in this specification, specify thepresence of stated features, integers, steps, operations, elements,and/or components, but do not preclude the presence or addition of oneor more other features, integers, steps, operations, elements,components, and/or groups thereof.

The corresponding structures, materials, acts, and equivalents of allmeans or step plus function elements in the claims below are intended toinclude any structure, material, or act for performing the function incombination with other claimed elements as specifically claimed. Thedescription of the present invention has been presented for purposes ofillustration but is not intended to be exhaustive or limited to theinvention in the form disclosed. Many modifications and variations willbe apparent to those of ordinary skill in the art without departing fromthe scope and spirit of the invention. The embodiment was chosen anddescribed in order to best explain the principles of the invention andthe practical application, and to enable others of ordinary skill in theart to understand the invention for various embodiments with variousmodifications as are suited to the particular use contemplated.

We claim:
 1. A tarp roller for rolling a tarp comprising: (a) a frameadapted for mounting to a tow vehicle, said frame having a first supportarm extending therefrom, and a second support arm extending therefromand spaced part from the first support arm; (b) a primary rotatablespindle being powered and removably connected between the first supportarm and the second support arm; and (c) a retainer for retaining thetarp against the primary rotatable spindle during rotation thereof. 2.The tarp roller of claim 1, wherein the primary rotatable spindle isremovably connected to the first support arm through a drive couplingassembly operatively connected to a hydraulic motor.
 3. The tarp rollerof claim 2, wherein the retainer comprises an elongate member mounted inremovable spaced apart, coaligned relation with the primary rotatablespindle to move with the primary rotatable spindle as it rotates.
 4. Thetarp roller of claim 3, further comprising a retainer mounting platefitted to the primary rotatable spindle, said retainer mounting platedefining a channel to receive the elongate member in torque transmittingengagement.
 5. The tarp roller of claim 4, further comprising a retainerend plate defining an opening to receive the primary rotatable spindleand an opening to receive the elongate member.
 6. The tarp roller ofclaim 2, wherein the second support arm is removably attached to theframe.
 7. The tarp roller of claim 2, wherein the second support arm ismovably attached to the frame.
 8. The tarp roller of claim 7, whereinthe second support arm is movably attached to the frame by means of ahinge.
 9. The tarp roller of claim 1, further comprising a secondaryguide roller rotatably attached to the frame at a position above andforward of the primary rotatable spindle.
 10. The tarp roller of claim9, wherein the secondary guide roller is rotatably mounted to a bracketremovably attached to the frame.
 11. A method of rolling a tarpcomprising the steps of: (a) feeding the tarp over a secondary rollerattached to a frame of a tarp roller at a position above and forward ofa primary rotatable spindle; (b) placing the tarp between the primaryrotatable spindle and a retainer comprising an elongate member mountedin removable spaced apart, coaligned relation with the primary rotatablespindle; and (c) rotating the primary rotatable spindle in a firstdirection to take up the tarp.
 12. The method of claim 10, furthercomprising the steps of: (d) rotating the primary rotatable spindle inan opposite direction to release tension within the rolled tarp; (e)separating the primary rotatable spindle and the retainer from the frameof the tarp roller; and (f) removing the primary rotatable spindle andthe retainer from the rolled tarp.